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Kaavagariet
Kaavagariet (Olinia usambarensis)

Family: Oliniaceae

Common names: Kaavagariet, Kabideleliet, Kabigeriet, Kaptalonget, Lgering, Merikwa, Muchegi, Mukodo, Musasia, Muta, Muthangira, Mwathathia, Nerekio, Nerrikwa, Nerugua, Ol-gelene, Ol-gireniet, Ol-kirenyi, Olinia, Transvaal olinia, Transvaalhardepeer

Distributed in: Kenya, South Africa (Africa)

Common uses: Agricultural implements, Boat building (general), Carvings, Flooring: industrial heavy traffic, Furniture, Handles: general, Joinery, Ladders, Mine timbers, Musical instruments, Piling, Plywood, Sporting Goods, Toys, Turnery

Tree size: Tree height is 30-40 m

Colors: the heart isPale brown, Yellowand the sapwoodWhite, Yellow.The grain isWavy, the textureFineand the lusterLow

Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to insect attack

Drying Defects: Moderate end spitting, Moderate twist/warp

Tree Identification: Bole/stem form is misshapen

Cutting Resistance: Cutting Resistance with green wood is difficult

Gluing: Moderate gluing properties

Nailing: Possible if prebored

Planing: Planes well, to a good finish

Resistance to Splitting: Poor

Response to hand tools: Difficult to machine


Painting: Satisfactory; Polishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity
Density 833 kg/m3
Bending Strength 654 1024 kg/cm2
Crushing Strength 485 699 kg/cm2
Hardness kg
Impact Strength cm
Shearing Strength 155 kg/cm2
Stiffness 117 135 1000 kg/cm2
Tangential Shrinkage %
Radial Shrinkage 5 %
Weight 817 657 kg/m3
Maximum Load cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 9310 14566 psi
Density 52 lbs/ft3
Maximum Crushing Strength 6899 9945 psi
Shearing Strength 2205 psi
Stiffness 1665 1923 1000 psi
Weight 51 41 lbs/ft3
Radial Shrinkage 5 %
Tangential Shrinkage 8 %

Density (dry weight) = 53-60 lbs/cu. ft
Density (dry weight) = 46-52 lbs/cu. ft.
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = medium
Max. crushing strength = high
Density (dry weight) = 61-67 lbs/cu. ft
Bending strength (MOR) = medium
Shrinkage, Tangential = moderate
Shrinkage, Tangential = large
Shrinkage, Tangential = fairly large
Shrinkage, Radial = moderate
Shrinkage, Radial = large
Shrinkage, Radial = fairly large

Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchDale, I.R., Greenway, P.J.,1961,Kenya Trees and Shrubs,Buchanans Kenya Estates Ltd. Nairobi Hatchards LondonEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaPalgrave, K.C.,1977,Trees of Southern Africa,Cape Town South AfricaSallenave, P.,1971,Proprietes Physiques et Mecaniques des Bois Tropicaux (Deuxieme,Supplement,C.T.F.T.Wimbush, S.H.,1950,Catalogue of Kenya Timbers,Govt. Printer Nairobi Kenya
*Come interpretare i dati (manleva su eventuali imprecisioni)